Standard PL13/41K/TT/4P - 13W CFL - 4 Pin - 2GX7 Base - 4100K
"This Standard compact 13 watt - 4-pin 4100K fluorescent provides 900 lumens of high quality illumination. The lamp incorporates amalgam technology that allows a greater temperature range of operation while maintaining lumen and color specifications. For applications requiring dimming - this lamp is fully dimmable on compatible electronic dimming ballasts. "
Manufacturer part number: CF13DS/E/841